---
id: CVE-2026-98578
title: 'nfc: st21nfca: validate ISO15693 inventory length'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  nfc: st21nfca: validate ISO15693 inventory length

  The ISO15693 inventory helper removes a two-byte prefix without checking
  that it exists, then accepts a one-byte rema…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 7974728094d35f38775417a26d8f30ea3602496a <
    e47b2a350bb0ff123434ec5484c6dc3333b0727c
  - >-
    Linux >= 7974728094d35f38775417a26d8f30ea3602496a <
    57d183764f3002f9625ee4deeeb20716c519534e
  - >-
    Linux >= 7974728094d35f38775417a26d8f30ea3602496a <
    3af2ea4035581a1607d9830779c187a0c7e225aa
  - >-
    Linux >= 7974728094d35f38775417a26d8f30ea3602496a <
    9fa21b0f78adb514e3bd96a505ddb752e9727ff3
  - >-
    Linux >= 7974728094d35f38775417a26d8f30ea3602496a <
    6353dae51bc9b3cad13c9d890b53311a46c96b4e
  - >-
    Linux >= 7974728094d35f38775417a26d8f30ea3602496a <
    fdd95e819d828c975aaeb258a3fed5dd7fd136d0
  - >-
    Linux >= 7974728094d35f38775417a26d8f30ea3602496a <
    a86987d03a4d39acdbe4533d83db4d656ea36c59
  - >-
    Linux >= 7974728094d35f38775417a26d8f30ea3602496a <
    7f2ea5ed588c03d481f0301e6c3d4240132383fb
  - Linux 3.16
published: '2026-10-18'
updated: '2026-10-18'
sourceUpdated: '2026-10-18T15:18:51.807Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-98578'
references:
  - url: 'https://git.kernel.org/stable/c/e47b2a350bb0ff123434ec5484c6dc3333b0727c'
  - url: 'https://git.kernel.org/stable/c/57d183764f3002f9625ee4deeeb20716c519534e'
  - url: 'https://git.kernel.org/stable/c/3af2ea4035581a1607d9830779c187a0c7e225aa'
  - url: 'https://git.kernel.org/stable/c/9fa21b0f78adb514e3bd96a505ddb752e9727ff3'
  - url: 'https://git.kernel.org/stable/c/6353dae51bc9b3cad13c9d890b53311a46c96b4e'
  - url: 'https://git.kernel.org/stable/c/fdd95e819d828c975aaeb258a3fed5dd7fd136d0'
  - url: 'https://git.kernel.org/stable/c/a86987d03a4d39acdbe4533d83db4d656ea36c59'
  - url: 'https://git.kernel.org/stable/c/7f2ea5ed588c03d481f0301e6c3d4240132383fb'
tags:
  - cve.org
ingestedAt: '2026-10-18T15:45:12.254Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

nfc: st21nfca: validate ISO15693 inventory length

The ISO15693 inventory helper removes a two-byte prefix without checking
that it exists, then accepts a one-byte remainder before reading data[1] as
the DSFID.

Require the prefix and at least two remaining bytes before copying the UID
data and reading the DSFID.

## Affected

- `Linux >= 7974728094d35f38775417a26d8f30ea3602496a < e47b2a350bb0ff123434ec5484c6dc3333b0727c`
- `Linux >= 7974728094d35f38775417a26d8f30ea3602496a < 57d183764f3002f9625ee4deeeb20716c519534e`
- `Linux >= 7974728094d35f38775417a26d8f30ea3602496a < 3af2ea4035581a1607d9830779c187a0c7e225aa`
- `Linux >= 7974728094d35f38775417a26d8f30ea3602496a < 9fa21b0f78adb514e3bd96a505ddb752e9727ff3`
- `Linux >= 7974728094d35f38775417a26d8f30ea3602496a < 6353dae51bc9b3cad13c9d890b53311a46c96b4e`
- `Linux >= 7974728094d35f38775417a26d8f30ea3602496a < fdd95e819d828c975aaeb258a3fed5dd7fd136d0`
- `Linux >= 7974728094d35f38775417a26d8f30ea3602496a < a86987d03a4d39acdbe4533d83db4d656ea36c59`
- `Linux >= 7974728094d35f38775417a26d8f30ea3602496a < 7f2ea5ed588c03d481f0301e6c3d4240132383fb`
- `Linux 3.16`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.